Fix Mantis 3109: Revert r11079 and reopen #2888 since I didn't realize that Fred messages also often use built-in suffix appending. Need to either use FUBAR's original solution or re-engineer something else.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11090 387891d4-d844-0410-90c0-e4c51a9137d3